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Conductivity and Resistivity

The conductiv...

Question

The conductivity of a material is 5 mho/m. What is it’s resistivity?

5 ohm m

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0.2 ohm m

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25 ohm m

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None of these.

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Solution

The correct option is B 0.2 ohm m
Conductivity is the inverse of resistivity.
So $σ = \frac{1}{ρ}$
Therefore $ρ = \frac{1}{5} = 0.2 o h m - m$ .

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